JP2004029849A5 - - Google Patents

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Publication number
JP2004029849A5
JP2004029849A5 JP2003315509A JP2003315509A JP2004029849A5 JP 2004029849 A5 JP2004029849 A5 JP 2004029849A5 JP 2003315509 A JP2003315509 A JP 2003315509A JP 2003315509 A JP2003315509 A JP 2003315509A JP 2004029849 A5 JP2004029849 A5 JP 2004029849A5
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JP
Japan
Prior art keywords
light
projection lens
optical system
shielding plate
opening
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Application number
JP2003315509A
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Japanese (ja)
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JP3685794B2 (en
JP2004029849A (en
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Priority to JP2003315509A priority Critical patent/JP3685794B2/en
Priority claimed from JP2003315509A external-priority patent/JP3685794B2/en
Publication of JP2004029849A publication Critical patent/JP2004029849A/en
Application granted granted Critical
Publication of JP3685794B2 publication Critical patent/JP3685794B2/en
Publication of JP2004029849A5 publication Critical patent/JP2004029849A5/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Claims (2)

光源と、
画素毎に形成されたミラー素子を有する反射型ライトバルブと、
前記光源からの放射光を前記反射型ライトバルブ上に集光する照明光学系と、
前記放射光が前記反射型ライトバルブの前記ミラー素子によって反射された光をスクリーン上に拡大投写する投写レンズと、
前記投写レンズ中又は前記照明光学系中のいずれかの位置に配置され、前記投写レンズからスクリーン上に投写される光の光線束の断面積の大きさを決定する絞りとを備え、
前記絞りは、開口を有する固定絞りと、前記開口における光線束の一部を遮光可能な遮光板とで構成されており、
前記遮光板を前記照明光学系の光軸又は前記投写レンズの光軸に向かう方向へ変位可能に構成し、前記遮光板の変位により前記反射型ライトバルブの前面で反射された不要反射光のスクリーン上への投写を低減可能にしたことを特徴とする投写型表示装置。 A light source;
A reflective light valve having a mirror element formed for each pixel ;
An illumination optical system for collecting the emitted light from the light source on the reflective light valve;
A projection lens for enlarging and projecting the light reflected on the screen by the emitted light is the mirror element of the reflection type light valve,
A diaphragm that is arranged at any position in the projection lens or the illumination optical system, and that determines a size of a cross-sectional area of a light bundle of light projected on the screen from the projection lens,
The diaphragm is composed of a fixed diaphragm having an opening, and a light shielding plate capable of shielding a part of the light beam in the opening,
A screen for unnecessary reflected light reflected on the front surface of the reflective light valve by the displacement of the light shielding plate, wherein the light shielding plate is configured to be displaceable in a direction toward the optical axis of the illumination optical system or the optical axis of the projection lens. A projection display device characterized in that projection on the top can be reduced . 前記開口のうち前記遮光板で遮光された部分を除く前記開口の形状は、前記照明光学系又は前記投写レンズの光軸に対して非回転対称である請求項１に記載の投写型表示装置。2. The projection display device according to claim 1, wherein a shape of the opening excluding a portion shielded by the light shielding plate in the opening is non-rotationally symmetric with respect to an optical axis of the illumination optical system or the projection lens.
JP2003315509A 2001-04-25 2003-09-08 Projection display Expired - Lifetime JP3685794B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003315509A JP3685794B2 (en) 2001-04-25 2003-09-08 Projection display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001127910 2001-04-25
JP2003315509A JP3685794B2 (en) 2001-04-25 2003-09-08 Projection display

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2002586079A Division JP3484435B2 (en) 2001-04-25 2002-04-23 Projection display device

Publications (3)

Publication Number Publication Date
JP2004029849A JP2004029849A (en) 2004-01-29
JP3685794B2 JP3685794B2 (en) 2005-08-24
JP2004029849A5 true JP2004029849A5 (en) 2005-08-25

Family

ID=31189854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003315509A Expired - Lifetime JP3685794B2 (en) 2001-04-25 2003-09-08 Projection display

Country Status (1)

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JP (1) JP3685794B2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005309337A (en) * 2004-04-26 2005-11-04 Fujinon Corp Projection type image display device
JP4906042B2 (en) * 2005-09-12 2012-03-28 キヤノン株式会社 Image projection optical unit and image projection apparatus
JP2007233004A (en) * 2006-02-28 2007-09-13 Sharp Corp Projector
JP2007233003A (en) * 2006-02-28 2007-09-13 Sharp Corp Projector
WO2012026390A1 (en) 2010-08-23 2012-03-01 三菱電機株式会社 Projection display device
WO2018003041A1 (en) * 2016-06-29 2018-01-04 マクセル株式会社 Projection-type video display device
JPWO2023037729A1 (en) * 2021-09-09 2023-03-16

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4032658B2 (en) * 2000-06-14 2008-01-16 三菱電機株式会社 Projection display
JP4776785B2 (en) * 2001-01-12 2011-09-21 キヤノン株式会社 Projection display

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